The HDL 50-A 4K is the most powerful HDL line array module from RCF with an internal amplifier pushing 8000 Watt peak power. The good news is that this amplifier module is also available as an upgrade kit for current HDL 50-A owners to turn it into a genuine 4K system.

An « artist » view of the HDL50 showing the 8 transducers

The HDL 50-A 4K is an active 3-way line array module designed for medium and large-sized events, indoors and outdoors. It features a sound pressure level of 143 dB SPL with a built-in Class-D 4000 W RMS four-channel amplifier.
Equipped with eight transducers, it offers excellent playback quality ideal for high performing musical applications. The proprietary 90 x 10 degrees 4PATH waveguide, paired with the symmetrical design of the cabinet delivers coherent coverage.

The 4K amplifier module is an essential part of HDL 50-A reengineering effort. Each of the four amplifier modules, 1000 W for the HF, 1000 W for the Midrange section and 1000 W + 1000 W for the 12” LF transducers operates at very low impedance producing a quick and detailed transient response, while the high damping factor improves sound quality and detail. New generation DSP handles all processing inside the cabinet and allows for cluster size adjustments and HF projection.

HDL 50 upgrade kit 4K

HDL 50-A 4K is not backward compatible with the previous line array model. Each HDL 50-A can be upgraded with the retrofit amplifier “HDL 50 UPGRADE KIT 4K” to turn it into a genuine 4K system doubling the power of the HDL 50-A and making transducers work at full performance.

The kit featuring two amp modules specifically made by Pascal Audio for RCF, fixed on an aluminium plate and heatsink.

Furthermore, the power supply section has been upgraded with a tripled current level on fast transients, for a level of detail usually achieved only in high-end studio monitors.
The kit includes connection cabling, thermal paste and assembly manual and must be assembled from a qualified service center.

More info on the RCF website